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Fiio K9 Pro ESS Hi-Res Desktop Balanced DAC Headphone Amplifier ES9038PRO*2 THX-AAA-788+ MQA
High Performance DAC ES9038PRO*2
THX AAA 788+ Amplifier Technology
Dual Voltage Linear Transformer
Isolated Digital and Analog Power Delivery
Dual femtosecond clocks
Qualcomm QCC5124 Bluetooth Chip
Supports LDAC/aptX Adaptive/aptX HD
Variable Input and Output Options
Inside the K9 Pro ESS are 2 ES9038PRO DAC chips, specifically designed for maximum performance in desktop-grade equipment.
One ES9038PRO chip, with all of its 8 parallel outputs, is used for each channel to achieve richly detailed sound with minimal distortion.
The THX AAA 788+ chips used in the K9 Pro ESS provides exemplary details and dynamics no matter if you are using low and high-impedance headphones.
The K9 Pro ESS can produce an undistorted 1100mW* under a 300Ω load, and an undistorted 2100mW* under a 32Ω load, 50% higher than the original THX AAA 788 amplifier chips.
(* Tested in Fiio Labs under balanced out)
MQA unfolding is supported on the K9 Pro ESS, allowing you to listen to high-resolution audio files that are not only reasonably sized, but also retain master-level sound quality that bring you directly into the recording studio.
Model: K9 Pro ESS
USB: XMOS XUF208
Max. supported sampling rate: 384kHz-32bit/DSD256 (USB), 192kHz-24bit (Coaxial), 96kHz-24bit (Optical)
Bluetooth receiver (5.0): AAC/SBC/aptX/aptX LL/aptX HD/LDAC/aptX/aptX Adaptive
Amp: THX AAA 788+
Recommended Headphone Impedance: 16~600 Ω
Volume Scroll: Potentiometer+ADC Sampling
Channel Balance: L12~R12 (0.5dB per level)
Fiio Control: Supported
Digital Inputs: USB B, Optical Fiber socket (SPDIF), RCA socket (COAXIAL)
Line Inputs: RCA socket (Single-Ended), 4.4mm balanced socket (Balanced)
Headphone Outputs: 6.35mm socket (Single-Ended), 4.4mm socket (Balanced), XLR4 balanced socket (Balanced)
Line Outputs: XLR3 Balanced socket (Balanced), RCA socket (Single-Ended)